3. 0T MRA evaluation in fenestration of the intra and extracranial artery

Objective To discuss the value of 3. 0T magnetic resonance angiography( MRA) in diagnosis of fenestration in intra and extracranial artery. Methods Between October 2010 and August 2012,three dimensional contrast enhanced( CEMRA) or three dimensional time of flight( 3D TOF) MR angiographies of 371 head and carotid arteries were collected. The reconstructed images were then processed into volume rending( VR),maximal intensity projection( MIP) and thin slicemultiplane reconstruction( TSMIP). And the different images were compared. Results 18( 4. 9%,18 /371) fenestrations of intra and extracranial artery were detected. In 18 fenestrations,11( 3. 0%,11 /371) fenestrations were located in basilar atrety: 10 fenestrations were located in proximal portion of basilar artery trunk,1 fenestration was present at basilar artery trunk; 3 fenestrations were present at vertebrobasilar junction; 1 fenestration was located in anterior cerebral artery; 1fenestrationwas located in anterior communicating artery; 2 fenestrations were located in middle cerebral artery. 3( 16. 7%,3 /18) of these fenestrations were associated with cerebral intracranial aneurysms. Conclusion CEMRA and 3D TOFMRA can clearly detect intra and extracranial artery fenestrations.